From Guild Wars 2 Wiki
Double click to use. Unlock the ability to become a Commander.
— In-game description
From a Commander trainer. The cost and attributes of the Commander's Compendium is identical at all locations.
|Commander Rupple||Dwayna High Road||300 +|
|Commander Yaffa||Fort Marriner||300 +|
|Master Strategist||Blue World Citadel, Green World Citadel, Red World Citadel, Frostreach Safe Zone, Badlands Safe Zone, Overgrowth Safe Zone||300 +|
|Master Strategist Rego||Imperator's Core||300 +|
|Master Strategist Valde||Hall of Legends||300 +|
- At release, this item cost 100 but only unlocked Commander privileges for the character who used it; as of the September 2014 Feature Pack update, the unlock is now account-wide.